chooseFile.js

export function chooseFile(callback, acceptType) {

    var CODE_REQUEST = 1000;
    var main = plus.android.runtimeMainActivity();
    if (plus.os.name == 'Android') {
        console.log("666");
        var Intent = plus.android.importClass('android.content.Intent');
        var intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        if (acceptType) {
            intent.setType(acceptType);
        } else {
            intent.setType("*/*");
        }
        main.onActivityResult = (requestCode, resultCode, data) => {
            if (requestCode == CODE_REQUEST) {
                const uri = data.getData();
                plus.android.importClass(uri);
                const Build = plus.android.importClass('android.os.Build');
                const isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
                const DocumentsContract = plus.android.importClass('android.provider.DocumentsContract');
                if (isKitKat && DocumentsContract.isDocumentUri(main, uri)) {
                    if ("com.android.externalstorage.documents" == uri.getAuthority()) {
                        console.log("6666");
                        var docId = DocumentsContract.getDocumentId(uri);
                        var split = docId.split(":");
                        var type = split[0];

                        if ("primary" == type) {
                            var Environment = plus.android.importClass('android.os.Environment');
                            callback(Environment.getExternalStorageDirectory() + "/" + split[1]);
                        } else {
                            var System = plus.android.importClass('java.lang.System');
                            var sdPath = System.getenv("SECONDARY_STORAGE");
                            if (sdPath) {
                                callback(sdPath + "/" + split[1]);
                            }
                        }
                    } else if ("com.android.providers.downloads.documents" == uri.getAuthority()) {
                        var id = DocumentsContract.getDocumentId(uri);
                        var ContentUris = plus.android.importClass('android.content.ContentUris');
                        var contentUri = ContentUris.withAppendedId(
                            //    Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                            Uri.parse("content://downloads/public_downloads"), id);
                        callback(getDataColumn(main, contentUri, null, null));
                    } else if ("com.android.providers.media.documents" == uri.getAuthority()) {
                        var docId = DocumentsContract.getDocumentId(uri);
                        var split = docId.split(":");
                        console.log(split);
                        var type = split[0];
                        console.log(type);
                        var MediaStore = plus.android.importClass('android.provider.MediaStore');
                        if ("image" == type) {
                            contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                        } else if ("video" == type) {
                            contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                        } else if ("audio" == type) {
                            contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                        } else {
                            contentUri = MediaStore.Files.getContentUri("external");
                        }

                        console.log(contentUri);
                        var selection = "_id=?";
                        var selectionArgs = new Array();
                        selectionArgs[0] = split[1];

                        callback(getDataColumn(main, contentUri, selection, selectionArgs));
                    }
                } else if ("content" == uri.getScheme()) {
                    callback(getDataColumn(main, uri, null, null));
                } else if ("file" == uri.getScheme()) {
                    callback(uri.getPath());
                }
            }
        }
        main.startActivityForResult(intent, CODE_REQUEST);
    }
}

function getDataColumn(main, uri, selection, selectionArgs) {
    plus.android.importClass(main.getContentResolver());
    let cursor = main.getContentResolver().query(uri, ['_data'], selection, selectionArgs,
        null);
    plus.android.importClass(cursor);
    if (cursor != null && cursor.moveToFirst()) {
        var column_index = cursor.getColumnIndexOrThrow('_data');
        var result = cursor.getString(column_index)
        cursor.close();
        return result;
    }
    return null;
}
export default chooseFile

使用

<template>
    <view class="content">
        <image @click="chooseFile" class="logo" src="/static/logo.png"></image>
    </view>
</template>

<script>
    import chooseFile from '../../util/chooseFile.js';
    
    export default {
        data() {
            return {
                title: 'Hello'
            }
        },
        onLoad() {

        },
        methods: {
            chooseFile(){
                chooseFile((path)=>{
                    console.log('111111111',path);
                    uni.getFileInfo({ //读取文件大小
                        filePath:path,
                        success: (res) => {
                            console.log('11111111',res)
                            const binSize = res.size;
                            console.log('size',binSize)
                        },
                        fail: (err) => {
                            console.log('222222222',err)
                        }
                    })
                })
            },
        }
    }
</script>

<style>
    .content {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .logo {
        height: 200rpx;
        width: 200rpx;
        margin-top: 200rpx;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 50rpx;
    }

    .text-area {
        display: flex;
        justify-content: center;
    }

    .title {
        font-size: 36rpx;
        color: #8f8f94;
    }
</style>